Mining machine pick sharpening die



Sept. 28, 1937. 1 J, CARR 2,094,291

MINING MACHINE PICK SHARPENING DIE Y Filed Aug. 3, 1955 l LI A'IIURNEYPatented Sept. 28, 1937 UNiTED sra'rgs PATENT OFFICE 1 Claim.

The invention relates to pick sharpening dies, and more especiallyl todies for use in hammer or the likemachines for undercut picks employedin coal mining machinery.

The primary object of the invention is the provision of dies of thischaracter, wherein in the use of the same in a hammer machine or thelike the undercut pick can be readily shaped and sharpened withoutrequiring hand work thereon.

Another object of the invention is the provision of dies of thischaracter wherein a striking member cooperates with an anvil so thatpicks employed in coal mining machines and particularly those known asundercut picks can be expeditiously sharpened automatically, thusrelieving hand work thereon.

A further object of the invention is the provision of dies of thischaracter which are simple in construction, readily and easily appliedto a hammer or the like machine, thoroughly reliable and eiiicient inoperation, assuring rapid sharpening and resharpening of under cutpicks, strong, durable and inexpensive to manufacture.

With these and other objects in View the invention consists in thefeatures of construction,

combination and arrangement of parts as will be hereinafter more fullydescribed, illustrated in the accompanying drawing which discloses thepreferred embodiment of the invention and pointed out in the claimhereunto appended.

In the accompanying drawing:

Figure 1 is a side elevation of the companion member, namely the die andanvil constructed in accordance with the invention.

Figure 2 is an end elevation thereof.

Figure 3 is a top plan view.

Figure 4 is a plan view of the undercut pick.

Figure 5 is a side view thereof.

Figure 6 is an end view of the same.

Figure 7 is a fragmentary vertical longitudinal sectional view throughthe anvil.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail A designates generally a strikingblock which includes a body having flat opposite walls l0, top Il and afiattened bottom l2, respectively, the said bottom being formed with thecurved or rounded edges I3 and I4, respectively for the convenientreversal of the block when in use. This block A is provided with thesockets l 5 which are outwardly inclined slightly so that the body ofsaid block can be separably fastened or anchored in the striker head ofa hammer machine not shown.

Cooperative with this block A is an anvil B, which is in the form of ablock like body I6 having a flared lower base portion Il vand in the topflat face i8 of this body is a substantially V shaped cavity I9, oneangular area of which has the forwardly convergent sides 20 so as togive a reverse bevel 2| to the cutting tip 22 of an undercutting pick23, while the angular area of this cavity l 9 effects the properangularity to the said tip with relation to the shank 24 of such pick 23is countersunk in this cavity as is shown in Figures. 1, 2 and 3 of thedrawing and on the striking of the block A against the upper edge ofsaid pick.

In shaping the pick the striking block A delivers a striking blow to thepick when seated in the cavity I9 and the latter sharpens its tip 22giving the reverse bevel as at 2l to opposite sides of such pick and atthe same time producing the required angularity to the cutting point 25of such tip. In this manner the pick 23 is sharpened automaticallywithout the necessity of any hand work thereon.

The finished pick 23 is shown in Figures 5 and 6 of the drawing and issharpened and shaped for use.

What is claimed is:-

In dies for mining machine pick sharpening, wherein a pick has a shankand a reversely beveled, faced tip extending at an angle thereto, thecombination of a striking block having a at work engaging face providedwith opposed rounded corner ends, each end matching the angle formedbetween the shank and tip of said pick, and an anvil having a flat faceprovided with a substantially V-shaped cavity adapted to receive andshape the tip of said pick and formed with reversely beveled sidesconverging in one direction for substantially one-half of the extent ofsaid cavity and arranged at the same angle as the opposed beveled facesof the tip for the pointing and sharpening of the said tip on impactfrom the striking block upon the pick.

JOSEPH J. CARR.

